Geared turbine installation



c. A. PARSONS, s. s COOLKAVND L. M. DOUGLAS.

GEARED TURBINE INSTALLATION.

APPLICATION FILED NOV. 5. i9 l8.

Patented Nov. 25, 1919 3 SHEETSSHEET I.

C. A. PARSONS, S. S. COOK AND L. M. DOUGLAS.

GEARED TURBINE INSTALLATION.

APPLICATION FILED NOV. 5. 19l8.

1,322, 8 1 Q Patented N 0v. 25, 1919. v 3 SHEET$SHEET 2- C. A. PARSONS, S. S. COOK AND L. M. DOUGLAS.

GEARED TURBINE INSTALLATION.

APPLICATION FILED NOV. 5. l9l8.

3 SHEETS-SHEET 3.

- PARSONS,

unrrnn snares mem @FFTQE.

CHARLES ALGERNON PARSONS, STANLEY SMITH COOK, AND LOUIS MORTIMER DOUGLAS, 0]? NEWCASTLE-UPON-TYNE, ENGLAND; SAID COOK AND SAID DOUGLAS ASSIGNORS TO SAID PARSONS.

GEARED TURBINE INSTALLATION.

Specification of Letters Patent. Patented Nov. 25, 1919.,

Application filed November 5, 1918. Serial No. 261,308.

' To all whom it may concern:

vBe it known that we, CHARLES ALoERNoN STANLEY SMITH Coon, and Louis MoR'rIMnRDoUoLAs, all subjects of the King of Great Britain and Ireland, and all residing at' Heaton Works, Newcastle-upon-Tyne, in the county of Northumberland, England, have invented certain new .anduseful Tm provements in Geared Turbine Installations, of which the following is a specification.

The present invention relates to geared turbine installation, especially for ship progulsion, and has for its object to arrange the rive in such a manner that deflection of the pinion shaft due to the torque is minimized. It has already been proposed to mount a turbine at either end of a pinion shaft so that each turbine drives the pinion through the end adjacent to it. This arrangement, however, leads in many cases to an unsatisfactory distribution of the power units so that the arrangement of the engine room is inconvenient.

The present invention consists in placing the two turbines on the same side of the pinion shaft, the near turbine bein connected to the near end of the pinion s aft, while the other turbine drives the opposite end of the pinion shaft through a small'diameter intermediate shaft passing through central holes in the near turbine rotor and in the pinion shaft.

The invention also consists in the improved geared turbine installations hereinafter described.

Referring to the accompanying drawin s:-

%igure 1 shows a high pressure turbine and low pressure turbine in series driving a common pinion in accordance with this invention.

Fig. 2 shows a similar arrangement in which the axial position of the rotors is controlled by the intermeshing teeth of the gears;

Fig. 3 shows a four turbine single reduction system. y

Fig. 4 shows a fourturbine double reduction system.

In carrying the invention into effect as illustrated in Fig. 1, two turbines a, b, are provided co-axial with the pinion shaft and situated atthe same side of it. The near turbine rotor c is mounted on a sleeve (1 and is adapted to be connected by a suitable sliding coupling 6 to the hollow shaft f of the pinion g. The second turbine b is adapted tobe connected by a suitable coupling h to anintermediate shaft is of small diameter passing axially through the hollow shaft d of the turbine rotor c and the hollow pinion shaft f and connected at its far end by a coupling Z to the hollow pinion shaft. By this arrangement the drive from the two turbines is taken to the two ends of the hollow pinion shaft. The central holes in British Patent specification No. 15959 of i In the form of the invention shown in Fig. 3 which shows a four turbine single reduction arrangement, each of the double pinions 1, 2, is driven b two turbines; the gear wheels are placed between the double are arranged in series and the steam is led from the exhaust of turbine 12 to two double flow turbines .13, 14, arranged in parallel. The astern turbines are in parallel and are in series with the two astern double .fiow turbines respectively. The axial position of the rotors is controlled by thrust blocks 5, 6.

According to another example of the invention illustrated in Fig. 4:, adapted to a four-turbine double reduction installation, each of the primary pinions 1, 2, is driven pinions so that a symmetrical arrangement is obtained. The two ahead turbines 11, 12,

by two turbines arranged as above described. 7

The primary gear wheels 19, 20, may be placed between the secondary pinions 21, 22 so that a symmetrical arrangement is obtained. The four ahead turbines in this installation may be arranged in series and both pinions may be driven under astern conditions. The longitudinal positions of the turbine rotors are in this example determined by the intermeshing gears, the steam flow being in opposite directions in the two turbines driving each-pinion. i

It will be seen that many other arrangements aCCOI'diIlg to the invention can be de signed, the essential featurebeing that the two turbines driving any pinion are placed on the same side bf it, the near turbine being connected to the hollow pinion shaft while the more remote turbine drives the far end of the hollow pinion shaft by means of a shaft passing through the near turbine rotor and the hollow piniion shaft.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is In a geared turbine installation of the type in which two turbines drive a common pinion, in combination, a hollow pinion shaft, two turbines on the same side of and coaxial with the said pinion shaft, the near turbine being connected to the near end of the pinion shaft, a small diameter intermediate shaft, the other. turbine being connected to the opposite end of the pinion shaft through said small diameter intermediate shaft which passes through the near turbine rotor and in the hollow pinion shaft.

In testimony whereof we have signed our.

names to this specification.

1 CHARLES ALGERNON PARSONS.

STANLEY SMITH 000K. LOUIS MORTIMER DOUGLAS. 

